fraction in the vehicle-engine fuels. In the tested blending ranges, based on the addition of different ethanol contents
into both a commercial diesel fuel and a B30 biodiesel-diesel blend and on the addition of 7.7% ethanol v/v into different
biodiesel-diesel blends, the progressive incorporation of ethanol did not result in significant losses of lubricity (increases in
wear scar) until the ethanol concentration was close to 100%.